Astronomy and Astrophysics – Astronomy
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993p%26ss...41..373m&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 41, no. 5, p. 373-380.
Astronomy and Astrophysics
Astronomy
7
Energetic Particles, Mars Atmosphere, Mars Environment, Planetary Magnetotails, Plasma Probes, Magnetopause, Magnetosheath, Spaceborne Astronomy, Mars, Charged Particles, Plasma, Boundaries, Particles, Bowshock, Magnetopause, Magnetosheath, Magnetosphere, Downstream, Nightside, Sled Instrument, Spacecraft Observations, Phobos 2 Mission, Pickup, Position (Location), Flux, Energy, Oxygen, Magnetotail, Intensity, Ions, Acceleration, Plasma Sheet
Scientific paper
Signatures of characteristic boundaries, interpreted to be the bow shock and magnetopause with, between them, the magnetosheath, were recorded for the first time in energetic particles (between 30 keV and 3.2 MeV) in the downstream nightside Martian environment by the SLED instrument aboard Phobos 2. Also, energetic particles, interpreted to be oxygen ions, were recorded by SLED at four distinct locations close to Mars. These include (a) anisotropic fluxes at the terminator shocks with energies of up to at least 72 keV; (b) anisotropic fluxes with energies of up to at least 225 keV inside the magnetopause, at a height above the planet of approximately 900 km in the subsolar part of the magnetosphere; (c) fluxes with energies of up to at least 3.2 MeV in the flanks of the magnetosheath displaying quasi-periodic variations (period approximately 45 min) which are synchronous across the recorded energy spectrum and correlated in time with changes in the local magnetic field; and (d) beams of oxygen ions with energies of up to at least 55 keV traveling out along open field lines in the magnetotail with, in some cases, a suggestion of confinement close to the neutral sheet. A preliminary discussion is provided concerning the energization of the various populations of particles identified.
Afonin Valeri
Keppler Erhard
Kirsch E.
McKenna-Lawlor Susan M. P.
Schwingenschuh Konrad
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